{
  "height": 93,
  "block_hash": "10b421b493c489b5dd10cd3380bed4ee44a0c890041b3099836cb42eb945ee16",
  "status": "confirmed",
  "bitcoin_block_height": 972978,
  "digest": {
    "alg": "sha256",
    "hex": "10b421b493c489b5dd10cd3380bed4ee44a0c890041b3099836cb42eb945ee16",
    "preimage": "block:{\"at\":\"2026-10-24T21:17:19.650Z\",\"entry_count\":1,\"first_seq\":96,\"height\":93,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":96,\"merkle_root\":\"9e0b04e8f5eb67093d8857b59d6eccedc4b13542a5e36b928175a9ff7a9407c4\",\"prev_hash\":\"ef807775ce8bad9f35cd6830d7741997c7a8c810f70586598d4908138fa0cf1d\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:26:48.983Z",
      "updated_at": "2026-10-24T22:38:37.669Z",
      "bitcoin_block_height": 972978,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add2299375bfa6061df2604e95b5c038b574dfd3ca475aea7ca4cc8a91e2e48ea59be0615d38cb0ecf36eaa"
        },
        {
          "type": "bitcoin",
          "block_height": 972978,
          "merkle_root": "d210051f3445c39bbf32fb4497d94f03b1526298585065034c1aa7d28ddfd046"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:26:48.983Z",
      "updated_at": "2026-10-24T22:38:37.669Z",
      "bitcoin_block_height": 972978,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add2299d6dfc406dd137e5a960c281625540fd25c4a9df6c37d8df932a776f9228c34c5763e34b3828f67ef"
        },
        {
          "type": "bitcoin",
          "block_height": 972978,
          "merkle_root": "d210051f3445c39bbf32fb4497d94f03b1526298585065034c1aa7d28ddfd046"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:26:48.983Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add2299d2d9160fed1a03959acef0d42b9a4c1b760c9c8dc82430909e71ddc43eef7d497a6f93beab4682e2"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/93/anchor.ots",
  "how_to_verify": "Download the .ots proof and run `ots verify -d <block_hash> <file>.ots` with the OpenTimestamps client, which checks the Bitcoin attestation against Bitcoin block headers. The digest is the block hash: sha256 of digest.preimage, the text \"block:\" followed by the canonical block header, which is the same header the issuer signs."
}